How many electrodes are there in a transistor ?

How many electrodes are in the tetrode?

How wiII you test wheather a transistor is damaged or not?

How are emitter and collecter biased with respect to base in a transistor ?

How many junctions does a transistor have?

How many effective regions are found in the CE mode of a transistor ?

If the base region of a transistor is made large as compared to the usual transistor ,how does it affect current gain of the transistor?

If the base region of a transistor is made large, as compared to a usual transistor, how does it affect (i) the collector current and (ii) current gain of this transistor.